Noncontacting power transfer apparatus

摘要

A power source device 1, when a load device is set at a predetermined position, transfers power in a noncontacting manner by electromagnetic induction from a primary winding L1 for power transfer to a secondary winding L3 for power transfer. In the load device 2, a secondary battery EB is charged by the secondary output of the secondary winding L3 for power transfer. When the load device 2, when the secondary output of the secondary winding L3 is produced, transfers a signal from a primary winding L4 for signal transfer to a secondary winding L2 for signal transfer in a noncontacting manner by electromagnetic induction. A driving control circuit 3, when receiving the output from the secondary winding L2 for signal transfer through a filter circuit 4, changes a transistor Q1 from intermittent driving to continuous driving. The primary winding L1 for power transfer and the secondary winding L2 for signal transfer are wound on a single C-shape core, whereas the secondary winding L3 for power transfer and primary winding L4 for signal transfer are wound on another single C-shape core 25.